In blue-violet colour light:

  • A
    Internodal growth is pronounced
  • B
    Increase size of lamina of leaf
  • C
    Both $(a)$ and $(b)$
  • D
    Reduces the expansion of leaves

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You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?

Which one of the following pairs of plant hormones inhibits flowering in some plants?

Which one pair is wrong $:-$

Difficult
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Match the following.
Column-$I$Column-$II$
$A$. Ethephon$P$. Inhibits seed germination
$B$. $ABA$$Q$. They all are acidic
$C$. $GA$$R$. Help overcome the apical dominance
$S$. Hastens fruit ripening in tomatoes and apples

Some flowers $(e.g., Oxalis)$ open in the morning and close during evening because of

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